battery chargers catalog -...

Battery Chargers Catalog

Products for mobile phones, smart phones, headsets,

portable media players, portable navigation devices,

notebook computers, industrial and medical devices

3Q 2008

Battery Chargers Catalog Texas Instruments 3Q 2008

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Battery Chargers

End applications in wireless, computing, consumer and industrial/medical markets continue to expand into the portable space. TI’s battery management solutions help address system protection, cost-effective linear and highly efficient switch-mode battery charging.

New advancements in switch-mode charging increase efficiency, thus decreasing power dissipation and promoting a green environment by wasting less energy.

With battery-powered systems demanding increased reliability, TI ensures maximum safety with products in addition to battery chargers that protect from over-voltage and over-current conditions.

TI’s products support applications such as mobile phones, smartphones, headsets, portable media players, portable navigation devices, notebook computers, industrial and medical. TI has the battery management device to match your design specifications, and this catalog puts you in touch with the evaluation modules, application notes, samples and data sheets you will need to get your design to market faster.

Visit power.ti.com

TI products support your battery management design challenges

Space is of utmost importance in portable applications. TI offers advanced solutions that incorporate QFN and wafer-level chip-scale packaging and feature a high degree of external component integration to reduce solution size. In addition to reducing board space, many of these solutions provide lower power dissipation and increase overall efficiency.

TI battery management solutions support a wide range of battery chemistries and cell counts, from popular Lithium-Ion (Li-Ion) technologies to industry-standard nickel metal hydride and lead acid batteries.

Whatever your battery management needs may be, TI is the place to find the solutions.

Products for mobile phones and smartphonesKey features: Input over-voltage protection, input over-current

protection, USB current limiting, mini-USB interface, USB-OTG

output, PowerPath™ management, small solution size

bq2431x: Smallest charger front-end protection. . . . . . . . . . . . . . . . . . . . . . . . . . 4

bq2408x: One-cell Li-Ion charger with input over-voltage protection. . . . . . . . . . 6

bq2407x: USB-friendly Li-Ion charger and PowerPath™ management IC . . . . . . 5

bq24150: 3-MHz synchronous switch-mode charger with FETs and USB

OTG support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Products for headsets and accessories Key features: Small solution size, input over-voltage protection,

USB charging

bq2402x: One-cell Li-Ion charger with autonomous USB and AC

adapter supply management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

bq2408x: One-cell Li-Ion charger with input over-voltage protection. . . . . . . . . . 6

bq2501x: Single-chip Li-Ion charger and DC/DC converter IC . . . . . . . . . . . . . . . 9

Making portable possible with linear and switch-mode battery-charging solutions

http://power.ti.com

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Texas Instruments 3Q 2008 Battery Chargers Catalog

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Battery Chargers

Products for portable media playersKey features: Input over-voltage protection, PowerPath™ management, fast

and efficient charging, small solution size

bq2431x: Smallest charger front-end protection IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

bq2408x: One-cell Li-Ion charger with input over-voltage protection. . . . . . . . . . . . . . . . . . . . . . 6

bq2407x: USB-friendly Li-Ion charger and PowerPath management IC. . . . . . . . . . . . . . . . . . . . 5

bq24150: 3-MHz synchronous switch-mode charger with FETs and

USB OTG support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

bq241xx: 1.1-MHz synchronous switch-mode charger with FETs for one- to three-cell

Li-Ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Products for portable navigation devicesKey features: Fast and efficient charging, longer battery life in higher temperature

environment, PowerPath management

bq2408x: One-cell Li-Ion charger with input over-voltage protection. . . . . . . . . . . . . . . . . . . . . . 6

bq2407x: USB-friendly Li-Ion charger and PowerPath management IC. . . . . . . . . . . . . . . . . . . . 5

bq24150: 3-MHz synchronous switch-mode charger with FETs and

USB OTG support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

bq241xx: 1.1 MHz synchronous switch-mode charger with FETs for one- to three-cell

Li-Ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Products for notebook computersKey features: High efficiency and accuracy, flexible programmability, dynamic

power management, automatic power source selection,

small solution size

bq24751A: ENERGY STAR®-compliant, switch-mode charger with

system power selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

bq24745: SMBus-controlled, level 2, multi-chemistry battery charger . . . . . . . . . . . . . . . . . . . . 11

Products for industrial and medical applications Key features: High efficiency and accuracy, flexible programmability, dynamic

power management

bq24751A: ENERGY STAR-compliant, switch-mode charger with

system power selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

bq24745: SMBus-controlled, level 2, multi-chemistry battery charger . . . . . . . . . . . . . . . . . . . . 11

bq2002: Simple NiMH/NiCd charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ResourcesApplication notes and online training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Evaluation modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Worldwide Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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The bq24314 provides protection from input over-voltage, input over-current and battery over-voltage conditions. The three-level protection offers maximum safety when charging a handheld device. With integrated FET, the bq24314 comes in 2-mm x 2-mm and 3-mm x 4-mm SON packages.

Key Features• Providesprotectionfrominputover-voltage,inputover-

current and battery over-voltage• Maximuminputvoltage:30V• IntegratedpowerFETandcurrentsensorthatsupportsup

to 1.5-A input current• Lessthan1-µsresponsetimeagainstinputover-voltage• Highimmunityagainstfalsetriggeringbecauseofvoltage

spikes and current transients• Statusindication–faultcondition• Thermalshutdown• Packaging:2-mmx2-mmand3-mmx4-mmSON

D A T AS H E E T S

A P PR E P O R T

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Battery Chargers4

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4.2 V Li-Ion battery

1 µF

AC adapter

1 µF

bq24314

OUT

VBAT

FAULT

PGOODCE

IN

ILIM

VSS

Charging circuit

Accurate battery OV:4.35 V ±1%

Programmable OCP up to 1.5 A

30 V max VIN OVP at 5.85 V

Small charger front-end protection ICbq24314

Get samples, datasheets, app reports and evaluation modules at: www.ti.com/sc/device/bq24314

Charger Front-End Protection Devices

DeviceOVP(V) OCP

LDO output

(V)

Maxoperatingcurrent

(µA)

Operatingtemp. range

(° C) Features Packaging

bq24300 10.5 Fixed 300 mA 5.5 500 0 to 125 Reverse polarity protection 8-SON

bq24304 10.5 Fixed 300 mA 4.5 500 0 to 125 Reverse polarity protection 8-SON

bq24305 10.5 Fixed 300 mA 5 500 0 to 125 Reverse polarity protection 8-SON

bq24314 5.85 Prog. <1.5 A — 600 0 to 125 Fault indication 8/12-SON

bq24314A 5.85 Prog. <1.5 A — 600 –40 to 125 Fault indication 8-SON

bq24315 5.85 Prog. <1.5 A 5.5 600 –40 to 125 Fault indication 8-SON

bq24316 6.5 Prog. <1.5 A — 600 0 to 125 Fault indication 8/12-SON

bq24380 6.3 No OCP 5.5 250 –40 to 125 Fault indication 8-SON

bq24381 7.1 No OCP 5 250 –40 to 125 Fault indication 8-SON

http://www.ti.com/sc/device/bq24314

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The bq24072 operates either from a USB port or a wall adapter. The 28-V input voltage rating along with input over-voltage protection and input current limiting add robustness to the charging circuits. The PowerPath™ management feature allows the system be powered directly off the input, reducing battery charge and discharge cycles and enabling instant system turn-on even with a depleted battery.

Key Features• 28-Vinputrating,upto2-Aoutputcurrent• Integrateddynamicpowermanagementfeature• IntegratedUSBchargecontrolwithselectable100-mA

and 500-mA maximum input current• Programmablepre-chargeandfast-chargesafetytimers• Thermalregulationforchargecontrol• Reversecurrent,short-circuitandthermalprotection• Statusindication:Charging/Done,PowerGood• Packaging:small16-lead,3-mmx3-mmQFN *Expected release September 2008.

OUT1

OUTIN

EN2

EN1

/CE

ISET

ILIM

TMR

VSS

BAT

TS

PGOOD

CHG

BAT

bq24072

HostBattery

pack

10 µF10 µF

Mini-USB

1 µF

USB-friendly Li-Ion charger and PowerPath™ management IC bq24072

Get samples and datasheets at: www.ti.com/sc/device/bq24072

Charger and PowerPath™ Management Devices

Device#

Inputs

Max VIN(V)

Maxcurrent

(A)Input

current limitingOVP(V)

Vsys(V)

Batteryvoltage

(V)Packaging

(SON)

bq24072 single 28 2 USB: 100/500 mAAdapter: prog. up to 2 A

6.6 Vbat+200 mV 4.2 3 x 3-16

bq24073 single 28 2 USB: 100/500 mAAdapter: prog. 200 mA-2 A

6.6 4.4 4.2 3 x 3-16


10.5 4.4 4.2 3 x 3-16


6.6 5.5 4.2 3 x 3-16

bq24070 single 18 2 USB only: 100/500 mA n/a 4.4 4.2 3.5 x 4.5-20

bq24071 18 2 USB only: 100/500 mA n/a 6 4.2 3.5 x 4.5-20

bq24030 single 18 2 USB only: 100/500 mA n/a 6 4.2 3.5 x 4.5-20

bq24031 dual 18 2 USB only: 100/500 mA n/a 6 4.1 3.5 x 4.5-20

bq24032A dual 18 2 USB only: 100/500 mA n/a 4.4 4.2 3.5 x 4.5-20

bq24035 dual 18 2 USB only: 100/500 mA 6 VIN-Vdrop 4.2 3.5 x 4.5-20

bq24038 dual 18 2 USB only: 100/500 mA n/a 4.4 4.36 3.5 x 4.5-20



Battery Chargers6

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One-cell Li-Ion charger with autonomous USB and AC-adapter supply management bq24020


The bq24020 automatically selects the USB port or the AC adapter as the power source for the system. In the USB configuration, the host can select from two preset charge rates of 100 mA or 500 mA. In the AC adapter configuration, an external resistor sets the charge current.

Key Features• Integrated1-AFETandcurrentsensor• IntegratedUSBcontrolwithselectable100-mAand

500-mA charge rates• Autonomouspowersourceselection• Statusindication:Charging/Done,PowerGood• Packaging:small10-lead,3-mmx3-mmQFN

AC

USB

STAT1

STAT2

VSS

OUT

TS

/CE

ISET2

ISET1


AC adapter

bq24020

One-cell Li-Ion charger with input over-voltage protection bq24085

Get samples, datasheets, app reports and evaluation modules at www.ti.com/sc/device/bq24085

The bq24085 provides the most cost-effective charging solution for a single-cell Li-Ion. With integrated FET, current sensor and reverse leakage protection, it requires minimum external components. Its input voltage rating of 18 V and over-voltage protection allow use of low-cost unregulated AC adapters. The thermal regulation feature maximizes charge rate in any charging environment.

Key Features• 18-Vinputrating• 6.5-Vor10.5-Vinputover-voltageprotection• Integrated750-mAFETandcurrentsensor• Programmablepre-chargeandfast-chargesafetytimers• Thermalregulationforchargecontrol• Reversecurrent,short-circuitandthermalprotection• Statusindication:Charging/Done,PowerGood• Packaging:small10-lead,3-mmx3-mmQFN

4.7 µF

IN

TMR

STAT1

STAT2

VSS

OUT

BAT

/CE

/PG

ISET


4.7 µF

AC adapter

bq24085

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USB Chargers

Device TopologyMax VIN

(V)

Maxcurrent

(A)Input current limiting

(mA) Notes Packaging

bq24150 switching 20 1.2 USB & adapter: 100/500/800 or no limit See page 8 2 x 2 WCSP-16

bq2402x linear 7 1 USB only: 100/500 See page 6 SON 3 x 3-10

bq2407x linear 28 2 USB:100/500; adapter: 200 mA-2 A See page 5 SON 3 x 3-16

bq2403x linear 18 2 USB only: 100/500 See page 5 SON 3.5 x 4.5-20

Linear Chargers

Device#

InputsMax VIN

(V)

Maxcurrent

(A)Timer(hrs.)

OVP(V) Functions Vbat (V)

Packaging(SON)

bq24085 single 18 0.75 * 3-10 6.5 /PG, /CE 4.2 3 x 3-10

bq24086 single 18 0.75 * 3-10 6.5 /PG, TS 4.2 3 x 3-10

bq24087 single 18 0.75 * 3-10 6.5 /TE, /CE 4.2 3 x 3-10

bq24088 single 18 0.75 * 3-10 10.5 /PG, TS 4.2 3 x 3-10

bq24080 single 7 1 7 n/a /PG, /CE 4.2 3 x 3-10

bq24081 single 7 1 7 n/a /TE, TS 4.2 3 x 3-10

bq24083 single 7 1 7 n/a /PG, /CE 4.2 or 4.06 3 x 3-10

bq24010 single 18 1 6 n/a /PG, TS 4.2 3 x 3-10

bq24012 single 18 1 6 n/a /PG, /CE 4.2 3 x 3-10

bq24013 single 18 1 6 n/a /CE, /TTE 4.2 3 x 3-10

bq24014 single 18 1 6 n/a /CE, TS 4.2 3 x 3-10

bq24018 single 18 1 6 n/a /CE, /TTE 4.36 3 x 3-10

bq24060 single 18 1 * 3-10 6.5 /PG, TS 4.2 3 x 3-10

bq24061 single 18 1 * 3-10 6.5 /PG, /CE 4.2 3 x 3-10

bq24064 single 18 1 * 3-10 10.5 /PG, TS 4.2 3 x 3-10

bq24020 dual 7 1 5 n/a /CE, TS 4.2 3 x 3-10

bq24022 dual 7 1 5 n/a /PG, /CE 4.2 3 x 3-10

bq24023 dual 7 1 5 n/a /CE, /TTE 4.2 3 x 3-10

bq24024 dual 7 1 5 n/a /TTE, TS 4.2 3 x 3-10

bq24025 dual 7 1 7 n/a /CE, TS 4.2 3 x 3-10

bq24026 dual 7 1 7 n/a /TE, TS 4.2 3 x 3-10

bq24027 dual 7 1 7 n/a /PG, /CE 4.2 3 x 3-10

*Programmable by resistor


Synchronous switch-mode charger with integrated FETs and USB OTG support bq24150

Get samples, datasheets and evaluation modules at: www.ti.com/sc/device/bq24150

Battery Chargers8

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The bq24150 offers the smallest solution size for single-cell Li-Ion applications. The 3-MHz PWM controller can work with ultra-small inductors. The IC with internal-power FETs and compensation network comes in a 2-mm x 2-mm WCSP package. Its high efficiency, input over-voltage protection, input current limiting and integrated boost converter—which provides USB On-the-Go output—make it ideal for USB applications.

Key Features• Synchronous3-MHzPWMcontroller• IntegratedpowerFETsforupto1.2-Achargerate• Integratedcurrentsensingandcompensation• Maximuminputvoltage:20-Vwith6-VOVP• Safetytimerwithresetcontrol• 0.8-µAmaxchargecurrentfromUSB• InputcurrentlimitingforbothUSBandadapter• USBOTGsupport• High-speed(3.4MHz)I2C interface• Short-circuit,over-voltageandthermalprotection• Packaging:16-pin,2-mmx2-mmWCSP

D A T AS H E E T S

1 µH

10 nF4.2 V Li-Ion battery

1 µF

USB

bq24150

SW

BOOT

PGND

CSIN

CSOUT

VBUS

SCL

SDA

STAT

OTG

VREF

bq24150 Selection Table

DeviceMax

VIN (V)Max

current (A)Input

current limiting OVP (V)Charge

voltage (V) Charge term. Package Power up behavior

bq24150 20 1.2 100/500/800 mA or no limit, set by I2C or OTG pin

6 Prog. by I2C, 3.5 - 4.42 V

Host-controlled through I2C

2 x 2 WCSP-16 Battery detect, automatically initiates charging if

battery present


6 Prog. by I2C, 3.5 - 4.42 V


2 x 2 WCSP-16 Does not automatically initiate charging


6 Prog. by I2C, 3.5 - 4.42 V


2 x 2 WCSP-16 No battery detect, initiate charging anyway

Benefits• Maximumbatterychargingperformanceanddesign flexibility in USB powered applications• Significantlyimproveschargetime• Minimizesheatdissipationwhencharging• Cutsboardspaceinhalf• Canachievehighpeak-efficiencyofupto92%,while

supporting a USB battery charging current up to 900 mA• FeaturesareverseboostUSBOTGmodethatgenerates

a voltage supply to power accessories• USB-friendlyboot-upsequenceallowsthechargeIC

to boot autonomously, which helps replenish deeply discharged batteries

Applications• Smartphones• Portablemediaplayers• Portableconsumerelectronics



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1.1-MHz synchronous switch-mode charger with FETs for one- to three-cell Li-Ionbq24105


The bq24105 is ideal for a wide variety of applications that use up to a 3-cell Li-Ion battery. It can accept up to 20-V input voltage. With integrated 2-A FETs and internal loop compensation, the bq24105 offers minimum solution size for space-limited portable applications. The synchronous power conversion offers high efficiency to applications that work with high-input voltage or high-charge rate.

Key Features• Synchronous1.1-MHzPWMcontroller• IntegratedpowerFETsforupto2-Achargerate• Integratedloopcompensation• Maximuminputvoltage:20V• Batterypacktemperaturesensing• Packaging:20-pin,3.5-mmx4.5-mmQFN• LowEMIversionsavailable:bq2412x

D A T AS H E E T S

A P PR E P O R T

10 µH 0.1 Ω

R1

R2 R3

R4


10 µF

USB

bq24105

OUT

PGND

SNS

BAT

ISET1

ISET2

FB

IN

STAT1

STAT2

/PG

/CE

TS

TTC

C1 sets safety timerR1 sets fast charge currentR2 sets precharge and termination currentR3 and R4 set battery regulation voltage

C1

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Single-chip Li-Ion charger and DC/DC converter ICbq25012


The bq25012 integrates a dual-input charger and a low-power, high-efficiency DC/DC converter in a single chip. The linear charger has internal-power FET and current sensor for up to 500 mA. The DC/DC converter operates at a synchronized 1-MHz switching frequency, allowing for the use of small inductors.

Key Features• Li-IonchargerandsynchronousDC/DCconverterina

single chip• AutonomouspowersourceselectionbetweenUSBand

AC adapter• InternalUSBcurrentlimitingat100mAor500mA• DC/DCconvertermaximumloadcurrent150mA• OptionalforcedPWMmode• Packaging:small20-lead,3.5-mmx4.5-mmQFN

D A T AS H E E T S

A P PR E P O R T

1 µFAC adapter

1 µFUSB


System

bq25012

FPWM

EN

SW

FB

BAT

ISET1

ISET2

AC

VSS

USB

STAT1

STAT2

/PG

CE


DeviceBuck converter

current (mA)Buck converter

output (V)

bq25010 150 Adjustable

bq25012 150 1.8

bq25015 300 Adjustable

bq25017 300 1.8


Device

Max VIN(V)

Max current

(A)

Charge voltage

(A)Charge

termination Package

bq24100 18 2 4.2 Standalone 3.5 x 4.5 QFN-20

bq24103 18 2 4.2 or 8.4 Standalone 3.5 x 4.5 QFN-20

bq24105 18 2 Prog. by resistor,

2.1 - 15.5

Standalone 3.5 x 4.5 QFN-20

bq24108 18 2 4.2 Standalone 3.5 x 4.5 QFN-20

bq24113 18 2 4.2 or 8.4 Host-controlledthrough /CE pin

3.5 x 4.5 QFN-20

bq24115 18 2 Prog. by resistor,

2.1 - 15.5

Host-controlled through /CE pin

3.5 x 4.5 QFN-20




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The bq24751A is a high-efficiency, synchronous battery charge controller with integrated compensation and system power selector, offering the lowest component count for notebook computers and industrial applications. Ratio-metric charge current and voltage programming facilitate very high regulation accuracies, and can be either hardwired with resistors or programmed by the system microcontroller using a DAC or with GPIOs.

D A T AS H E E T S

EVALUATION

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Adapter System load

Power sourceselector

Power stage

Battery pack

AC adapterdetection

DAC

DAC

Host

Input over-voltage protection

DAC

ADC

DAC

bq24751A

ENERGY STAR®-compliant switch-mode charger with system power selectorbq24751A

Get samples, datasheets and evaluation modules at: www.ti.com/sc/device/bq24751A

Switch-Mode Charge Controllers

DeviceMax

VIN (V)Power

selectorAC over power

protectionTemp sense

Input OVP

DPM active indicator Compensation Standalone Package

bq24705 28 3 3 3 — 3 Internal No 4 x 4 QFN-24

bq24750 28 3 3 3 — 3 Internal No 5 x 5 QFN-28

bq24751A 28 3 3 — 3 — Internal No 5 x 5 QFN-28

bq24740 28 — — — — 3 Internal No 5 x 5 QFN-28

bq2954 7 — — 3 — — External Yes PDIP or SOIC-16

bq2000 7 — — 3 — — N/A Yes PDIP, TSSOP or SOIC-8

Key Features• Fixed300-kHz,NMOS-NMOSsynchronousbuckwith

6-V gate drive• 30-nsminimumdriverdead-timeand99.5%maximum

duty cycle• ±0.5%chargevoltageregulationaccuracy• ±4%chargeandadaptercurrentregulationaccuracy

at 4 A• ±2%20xinputcurrentsenseamplifieraccuracy• Inputvoltagerange:5V-28V,chargingatwo-

to four-cell Li-Ion• Packaging:28-lead,5-mmx5-mmQFN

http://www.ti.com/sc/device/bq24751A


Battery Chargers 11

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The bq24745 is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. Input-current, charge-current and charge-voltage DACs can be easily programmed by the system power-management microcontroller using SMBus. The bq24745 charges one to four-series Li+ cells and is available in a 28-pin, 5-mm x 5-mm QFN package.

Adapter System load

Power sourceselector

Power stage

Battery pack

+3.3 V or 5 V

SMBus

AC adapterdetection

Compensation

SMBusHost

Dig I/O

bq24745

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Get samples, datasheets and evaluation modules at: www.ti.com/sc/device/bq24745

SMBus-controlled, level 2, multi-chemistry battery charger bq24745

Key Features• NMOS-NMOSsynchronousbuckconverterwithfixed

300-KHzfrequencyand>95%efficiency• 0.5%charge-voltageregulationaccuracy• 3%charge-currentregulationaccuracy• 3%input-currentlimitingaccuracy• 2%input-currentsenseamplifieraccuracy• Dynamicpowermanagement• Inputcurrentcomparator• Inputover-voltageprotection• SimplifiedSMBuscontrol oChargevoltage(1.024V–19.2V) oChargecurrent(128mA–8.064A) oAdaptercurrent(256mA–11.004A)• Packaging:28-pin,5-mmx5-mmQFN

EVALUATION

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Simple NiMH/NiCd chargerbq2002


The bq2002 controls a current-limited or constant-current supply to build a cost-effective charger for NiMH or NiCd batteries. It integrates fast charge with optional top-off and pulse-trickle charge. Fast charge is terminated by any of the five factors: peak voltage detection, negative delta voltage, maximum voltage, maximum temperature and maximum time.

Key Features• Spinsavailablefor∆T/∆t, -∆V and PVD charge termination• DirectLEDoutputdisplayschargestatus• Internalband-gapvoltagereference• Optionaltop-offcharge• Selectablepulsetricklechargerates• Packaging:8-pinDIPorSOIC

Voltagesense

LED display

Thermistor

Constantcurrentsource

Safetytimer

settings

Chargeinhibit

Temperaturesense

INH

TM bq2002

LED

CC

BAT

TS

Battery charger design factors

Battery chemistry — Each battery chemistry has unique requirements for its charge algorithm, which is critical for maximizing its capacity, cycle life and safety.

Control topology — A simple linear topology works well in applications with low-power (e.g., one- or two-cell Li-Ion) battery packs that are charged at less than 1 A. A switch-mode topology is ideally suited for fast charging from USB ports or for large battery packs that require charge rates >1 A. The switch-mode conversion minimizes heat generation during charging.

Input voltage — Wide input-voltage range of the IC and input over-voltage protection offer maximum safety and allow use of low-cost unregulated wall adapters.

NiMH/NiCd Chargers

DeviceMax

VIN (V)Chargecurrent

Timer, top-off, pulse trickle options

Discharge before charge option

Chargestatus outputs Package

bq2002 7 limited by external supply 3-level setting — 1 8-pin DIP or SOIC

bq2000 7 set by resistor Prog. by RC — 1 8-pin DIP, SOIC or TSSOP

bq2004 7 set by resistor 9-level setting 3 2 status outputs, 3-modedisplay options

16-pin DIP or SOIC

PR

O D U C

T

S

AM P L E S

D A T AS H E E T S

A P PR E P O R T

EVALUATION

M O D U L E



Resources 13

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Dual Battery Pack Charger slua462

Battery Charger Front-End IC Improves Charging System Safety slyt294

Host-side Gas-Gauge-System Design Considerations for Single-Cell Handheld Apps slyt285

Extending Single-Input Charger to Dual-Input Applications slua437

Enhanced-Safety, Linear Li-Ion Battery Charger with Thermal Regulation and Input OV slyt269

Input Filter Design for Portable Power Management System slua413

Drive High-Current LEDs slva265

Dynamic PowerPath™ Management and Dynamic Power Management slua400

Selecting the Correct IC for Power-Supply Applications slyt259

Dynamic PowerPath Management Simplifies Battery Charging from Solar Panels slua394

Battery Charger Termination Issues With System Load Applied Across Battery (Rev. A) slva166a

Li-Ion Switching Charger Integrates Power FETs slyt224

Power Dissipation Analysis and Circuit Design for Sync Switching Battery Charger slua345

Battery Charger Termination Issues With System Load Applied Across Battery slva166

Battery chargers application reportsTo access any of the following application reports, type the URL www-s.ti.com/sc/techlit/litnumber and replace litnumber with the number in the Lit Number column.

For a complete list of battery charger application reports, visit ti.com/batterycharge and click on application notes.

A P PR E P O R T

Visit www.ti.com/training, select ‘Analog’ and look for the Power Management heading for the following courses of online training.

• BatteryCapacityMonitoringDesignConsiderationsforLi-IonBatteries

• BatteryChargingSystemPracticalDesignConsiderations

• ImprovingPowerSupplyEfficiency-TheGlobalPerspective

• Li-IonBatteryFundamentalsandBatteryPackElectronicsDesign

• PracticalConsiderationsinTroubleshooting&OptimizingPowerSupplyControl

• SafetyConsiderationsinPowerSupplyDesign

• Green-ModePowerbytheMilli-Watt

Online training

http://www.ti.com/batterycharger

http://www-s.ti.com/sc/techlit/slua462

http://www-s.ti.com/sc/techlit/slyt294





http://www-s.ti.com/sc/techlit/slva265








http://www.ti.com/training


Resources14

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TI’s battery-charger evaluation modules allow you to determine how a specific product will operate in your system, so you can deliver winning designs to market faster. To order any of the following evaluation modules, visit the product folder or contact your local TI Product Information Center or your local distributor.

To make it easier for you to learn about new analog products from TI as soon as they are available, we would like to extend you an invitation to receive our monthly Analog Connection eNewsletter. The Analog Connection eNewsletter provides updates on new analog products from TI, including amplifiers, data converters, power management and interface ICs.

Visit www.ti.com/analogenewsletter to subscribe!

Description Part No. Price

bq24314 evaluation module BQ24314EVM $49.00

bq24020 bq TINY-II evaluation module BQ24020EVM $49.00

bq24105 evaluation module BQ24105 EVM $49.00

bq24751A evaluation module BQ24751AEVM $149.00

bq2002 evaluation module for NiCd/NiMH, linear with -dv or peak voltage detect

DV2002L2 $99.00

bq24085 battery charger evaluation module BQ24085EVM $49.00



bq25010 evaluation module bq25010EVM $49.00

Battery charger evaluation modules (EVMs)

Stay up-to-date on the latest high-performance analog ICs Subscribe to TI’s monthly Analog Connection eNewsletter!

http://www.ti.com/analogenewsletter

http://focus.ti.com/docs/toolsw/folders/print/bq24314evm.html



http://focus.ti.com/docs/toolsw/folders/print/bq24751aevm.html

http://focus.ti.com/docs/toolsw/folders/print/dv2002l2.html






Resources 15

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TI Worldwide Technical Support

InternetTI Semiconductor Product Information Center Home Pagesupport.ti.com

TI Semiconductor KnowledgeBase Home Pagesupport.ti.com/sc/knowledgebase

Product Information CentersAmericasPhone +1(972) 644-5580Fax +1(972) 927-6377Internet/Email support.ti.com/sc/pic/americas.htm

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Important Notice: The products and services of Texas Instruments Incorporated and its subsidiaries described herein are sold subject to TI’s standard terms and conditions of sale. Customers are advised to obtain the most current and complete information about TI products and services before placing orders. TI assumes no liability for applications assistance, customer’s applications or product designs, software performance, or infringement of patents. The publication of information regarding any other company’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

© 2008 Texas Instruments IncorporatedPrinted in U.S.A. by (Printer, City, State)

Printed on recycled paper

The platform bar, PowerPath and PurePath are trademarks of Texas Instruments.All other trademarks are the property of their respective owners.

Safe Harbor Statement: This publication may contain forward-looking statements that involve a number of risks and uncertainties. These “forward-looking statements” are intended to qualify for the safe harbor from liability established by the Private Securities Litigation Reform Act of 1995. These forward-looking statements generally can be identified by phrases such as TI or its management “believes,” “expects,” “anticipates,” “foresees,” “forecasts,” “estimates” or other words or phrases of similar import. Similarly, such statements herein that describe the company's products, business strategy, outlook, objectives, plans, intentions or goals also are forward-looking statements. All such forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those in forward-looking statements. Please refer to TI's most recent Form 10-K for more information on the risks and uncertainties that could materially affect future results of operations. We disclaim any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this publication.

E010208

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With the battery chargers selection tool, answer just a few questions to quickly narrow your search for the products for your design. The tool features detailed decision trees that will lead you to recommended products most suited to your design, based on:

• Batterychemistry (Li-Ion, Li-Pol, NiMH, NiCd, Lead Acid)

• Numberofcellsinaseries

• Topologyneeded

(linear or switch-mode)

TI’s battery chargers selection tool finds the right product for your design

Get started today! Visit www.ti.com/batterycharger

http://www.ti.com/batterycharger

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